340 Running super weird
Best I can do right now is point you to previous discussions.
They will make more sense when you are looking at hte mechanism.
The instructions were writtern by people who didn't understand what I wrote above.
When you increase the advance allowance slots, it also increases the tension on the primary spring. Increasing the slots 2* will also bring the secondary spring into play 2* sooner.
https://board.moparts.org/ubbthread...solved-some-tuning-questions.html#Post2631077
Changing the limit changes up the spring tension and therefore changes when the weights move out.
If you reduce the limits a shorter long loop spring is needed. OR the tabs (spring perches) need to be bent.
Best I can do right now is point you to previous discussions.
They will make more sense when you are looking at hte mechanism.
The instructions were writtern by people who didn't understand what I wrote above.
When you increase the advance allowance slots, it also increases the tension on the primary spring. Increasing the slots 2* will also bring the secondary spring into play 2* sooner.
Reading the graph, we think that reducing the advance to 18* will result in something like sketched here:
But what actually happens is it starts advancing earlier and ends up more like this:
(using orange and purple springs for example.)
Preload can be regained by bending the spring perches out.. But we want to limit the number of times we bend them back and forth!
*PS. Ignore that "factory standard v8" nonsense. No such thing I've seen.
https://board.moparts.org/ubbthread...solved-some-tuning-questions.html#Post2631077
Changing the limit changes up the spring tension and therefore changes when the weights move out.
If you reduce the limits a shorter long loop spring is needed. OR the tabs (spring perches) need to be bent.
https://www.forabodiesonly.com/mopar/threads/carb-choice-for-a-mutt-motor.563226/post-1974714539